John Lennon's ex-lover May Pang has slammed his widow Yoko Ono for erasing her relationship with the late Beatle from the musical about his life at Broadway.

Pang, originally Lennon and Ono's personal assistant, became the "Imagine" singer's girlfriend during his two-year separation from Ono, reported Ireland Online.

But the 55-year-old - who is now staging a photographic exhibition in honour of the 25th anniversary of Lennon's 1980 murder - is furious that Ono has "airbrushed" her out of Lennon's musical biopic.

"I feel I'm getting airbrushed out of the whole Lennon story. I saw the synopsis of the musical. There is not one reference to me at all. I'm airbrushed out again," she said.

Ono and Pang are not the only women in Lennon's life who are paying tribute to the star - his first wife Cynthia Lennon is releasing a memoir about her ex-love, entitled "John".